①1月0℃等温线；

②400毫米年等降水量线；

③800毫米年等降水量线；

④热带与亚热带的分界线；

⑤种植业与畜牧业的分界线；

⑥湿润区与半湿润区的分界线

    It's sunny today. The sun is shining(照耀)in the sky and it's very hot. Nancy goes to the train station(车站)to meet her mother at noon. She walks in the street. There are no trees and she's fat. So she feels very hot. But she doesn't find (发现)a boy walking behind her. And she meets a friend and says "Hello" to him. "Who's the boy behind you?" asks(问) the man. Now she sees the boy. She is angry and asks, "Why(为什么) do you walk behind me, boy?" there's no shade(阴凉处) in the street, you know" answers the boy. "It's cool behind you, I think(想)."

甲烷与四氯化碳分子的空间构型相同，有关两者的比较中正确的是（　　）